package com.yyh.myblog.web.admin;

import com.yyh.myblog.entity.Type;
import com.yyh.myblog.service.TypeService;
import javafx.geometry.Pos;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.web.PageableDefault;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.validation.Valid;

/**
 * @author yyh
 * @date 2021/2/23 18:06
 * 页面分页处理控制器
 * 页面跳转控制
 */
@Controller
@RequestMapping("/admin")
public class TypeController {

    @Autowired
    private TypeService typeService;
    /**
     * 页面分页处理方法
     * 其中@PageableDefault可对页面显示数量、排序进行处理
     * @param pageable
     * @param model
     * @return 分类页面
     */
    @GetMapping("/types")
    public String types(@PageableDefault(size = 6,sort = {"id"},direction = Sort.Direction.DESC) Pageable pageable,
                        Model model){
        model.addAttribute("page",typeService.listType(pageable));
        return "admin/types";
    }

    @GetMapping("/types/input")
    public String input(Model model) {
        //利用model赋予前端type值(th:object="${type}")保证前端错误提示可从type获取name值注释可用
        model.addAttribute("type", new Type());
        return "admin/types-input";
    }

    /**
     * 根据当前对象的id获取当前分类对象type（包含id）
     * 并跳转到编辑页面
     * @param id
     * @param model
     * @return
     */
    @GetMapping("/types/{id}/input")
    public String  editInput(@PathVariable Long id, Model model) {
        model.addAttribute("type",typeService.getType(id));
        return "admin/types-input";
    }

    /**
     * 提交并校验重复分类与新增结果校验
     * 其中@Valid可对type进行校验
     * 而BindingResult接受校验后的结果
     * @param type
     * @param result
     * @param attributes
     * @return
     */
    @PostMapping("/types")
    public String post(@Valid Type type ,
                       BindingResult result ,
                       RedirectAttributes attributes) {
        Type type1 = typeService.getTypeByName(type.getName());
        if (type1 != null) {
            result.rejectValue("name","nameError","不能添加重复的分类");
        }
        if (result.hasErrors()) {
            return "admin/types-input";
        }
        Type t = typeService.saveType(type);
        if(t == null){
            attributes.addFlashAttribute("message","新增失败");
        }else {
            attributes.addFlashAttribute("message","新增成功");
        }
        return "redirect:/admin/types";
    }

    /**
     * 根据对象的id修改editInput页面传过来的type对象并保存修改后的对象
     * @param type
     * @param result
     * @param id
     * @param attributes
     * @return
     */
    @PostMapping("/types/{id}")
    public String editPost(@Valid Type type, BindingResult result, @PathVariable Long id,
                           RedirectAttributes attributes) {
        Type type1 = typeService.getTypeByName(type.getName());
        if (type1 != null) {
            result.rejectValue("name","nameError","不能添加重复的分类");
        }
        if (result.hasErrors()) {
            return "admin/types-input";
        }
        Type t = typeService.updateType(id,type);
        if(t == null){
            attributes.addFlashAttribute("message","更新失败");
        }else {
            attributes.addFlashAttribute("message","更新成功");
        }
        return "redirect:/admin/types";
    }

    @GetMapping("/types/{id}/delete")
    public String delete(@PathVariable Long id, RedirectAttributes attributes) {
        typeService.deleteType(id);
        attributes.addFlashAttribute("message","成功删除");
        return "redirect:/admin/types";
    }

}
